When 410.0 nm light hits a piece of solid barium, electrons are ejected with a kinetic energy of 31.1 kJ/mol. If you want to decrease the kinetic energy of the ejected electrons to 20.0 kJ/mol, what wavelength must you use?
ans:426.2 nm
thxxx
SPECTRUM
2009-04-19 10:17 pm
回答 (1)
2009-04-19 11:04 pm
✔ 最佳答案
Please look at the followings:圖片參考：http://i601.photobucket.com/albums/tt95/physicsworld9999/physicsworld01Apr191503.jpg?t=1240124640
參考: Physics king
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https://hk.answers.yahoo.com/question/index?qid=20090419000051KK00943